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用CSS实现一个简单的幻灯片效果页面

2017-03-02 17:30 851 查看
又是一个常见面试题,不搜不知道,一搜吓一跳,有很多很有意思的写法。

第一反应是利用CSS3的animation。不过为了兼容浏览器,记得加各浏览器前缀(“chrome和safira:-webkit-”、“firefox:-moz-”、“opera:-o-”)

下面说说用到的animation各属性。

animation-name(动画名字,需用引号包裹)

animation-duration(动画持续时间,如:20s)

animaiton-iteration-count(循环次数,“infinite”为无线循环)

还有一个很重要的“keyframes(关键帧)”,书写格式为:@keyframes “动画名字”{}

“{}”内根据设置内容从“0%”到“100%”依次编写,注意“0%”一定不能把百分号省略

<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
.myDiv {
width:300px;
height: 300px;
margin: 20px auto;
-webkit-animation-name: 'loop';
-webkit-animation-duration: 10s;
-webkit-animation-iteration-count: infinite;
}
@-webkit-keyframes "loop"{
0% { background: url("images/m15.jpg") no-repeat;}
25% { background: url("images/m10.jpg") no-repeat;}
50% { background: url("images/m11.jpg") no-repeat;}
75% { background: url("images/m12.jpg") no-repeat;}
100% {background:  url("images/m15.jpg") no-repeat;}
}
</style>
</head>
<body>
<div class="myDiv"></div>
</body>
</html>


下面这个写法也很有意思。这个是改变背景的透明度

<!DOCTYPE html>
<head>
<meta charset="utf-8" />
<title>css3实现幻灯片效果</title>
<meta content="" name="description" />
<meta content="" name="author" />
<style type="text/css">
.cb-slideshow{
width:400px;
height:400px;
margin:0 auto;
z-index:0;
}
.cb-slideshow li{
position:absolute;
width:400px;
height:400px;
background-size:cover;
background-repeat: none;
opacity:0;
z-index:0;
-webkit-animation: loops 36s linear infinite 0s;
}
.cb-slideshow li:nth-child(1){
background-image: url(images/m10.jpg);
}
.cb-slideshow li:nth-child(2){
background-image: url(images/m11.jpg);
-webkit-animation-delay: 6s;
}
.cb-slideshow li:nth-child(3){
background-image: url(images/m12.jpg);
-webkit-animation-delay: 12s;
}
.cb-slideshow li:nth-child(4){
background-image: url(images/m15.jpg);
-webkit-animation-delay: 18s;
}
.cb-slideshow li:nth-child(5){
background-image: url(images/m16.jpg);
-webkit-animation-delay: 24s;
}
.cb-slideshow li:nth-child(6){
background-image: url(images/m17.jpg);
-webkit-animation-delay: 30s;
}
@-webkit-keyframes "loops" {
0% {
opacity: 0;

}
8% {
opacity:1;
}
17% {
opacity:1;
}
25% {
opacity:0.5;
}
100% {
opacity: 0;
}
}

</style>
</head>
<body>
<ul class="cb-slideshow">
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</body>


还有两种写法,利用了label和a的特性。不完全算是幻灯片,先贴上来看看.

<!doctype html>
<html>
<head>
<style>
img {
display: none;
width: 100px;
height: 100px;
}

input:checked + img {
display: block;
}

input {
position: absolute;
left: -9999px;
}

label {
cursor: pointer;
}
</style>
</head>
<body>
<div id="cont">
<input id="img1" name="img" type="radio" checked="checked">
<img src="a.png">
<input id="img2" name="img" type="radio">
<img src="b.png">
</div>
<div id="nav">
<label for="img1">第一张</label>
<label for="img2">第二张</label>
</div>
</body>
</html>


<!DOCTYPE HTML>
<html>
<head>
<style>

#cont {
position: relative;
height: 100px;
}
img {
position: absolute;
width: 100px;
height: 100px;
z-index: 1;
}
img:first-child,
img:target {
z-index: 2;
}

</style>
</head>
<body>
<div id="cont">
<img id="img1" src="a.jpg">
<img id="img2" src="b.jpg">
</div>
<div>
<a href="#img1">one</a>
<a href="#img2">two</a>
</div>
</body>
</html>
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标签:  chrome css3 动画
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